Citazione APA

Nye, R., & Morpurgo, J. (1965). History of the united states: The birth of the U.S.A (2nd ed.). Penguin books.

Stile di citazione Chicago

Nye, R.B, e J.E Morpurgo. History of the United States: The Birth of the U.S.A. 2nd ed. United States: Penguin books, 1965.

Citazione MLA

Nye, R.B, e J.E Morpurgo. History of the United States: The Birth of the U.S.A. 2nd ed. Penguin books, 1965.